Neutral Regulator and Alkaline Regulator are phosphate based buffers and will not increase your KH. To increase KH, you will need to use Alkaline Buffer, which is a carbonate based buffer.

That said, often so-called "KH" test kits are actually measuring "total alkalinity", not KH. Neutral Regulator and Alkaline Regulator will increase your total alkalinity, so do no the alarmed if your "KH" goes up - it is likely that your test kit is simply misreading "total alkalinity" as "KH".